The question is:why would they get it from him? Has he had enough? I would think leaking a script will not go over well. He was just in an interview with Seth Meyers recently, and didn't seem at odds with what was going on behind the scenes. Was it leaked as a response to the show's politics, or out of anger because a sketch they wrote was turned down at the last minute?
If he thought a funny skit he wrote was replaced by a less funny one for PC reasons, it might not have sat well with him.
Good question. He’s been at SNL for an extremely long time- I think off and on since ‘76, so he’s got to be used to scripts getting scrapped at the last minute. In the Behind The Scenes book, they start the week out with a ridiculous amount of sketches and they are cut all the way up until air. So it is weird for someone to be so upset over one being cut like this.